(4-Hydroxyphenyl)phosphonic Acid CAS 33795-18-5
| CAS No. | 33795-18-5 |
| Molecular Formula | C6H7O4P |
| Molecular Weight | 174.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C6H7O4P, (4-Hydroxyphenyl)phosphonic Acid contains a phosphate ester group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 174.09 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
(4-Hydroxyphenyl)phosphonic Acid (CAS 33795-18-5), molecular formula C6H7O4P and molecular weight 174.09 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), (4-Hydroxyphenyl)phosphonic Acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C6H7O4P |
| Molecular Weight | 174.09 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.5 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1966 |
Related Hydroxyphenyl Standards
- (2-Hydroxyphenyl)phosphonic acid (CAS 53104-46-4)
- n-(4-Hydroxyphenyl)-n-methylprop-2-ynamide (CAS 1042536-61-7)
- 1-(4-Hydroxyphenyl)-2-chloroethanol (CAS 4973-17-5)
- Methyl 3-(4-hydroxyphenyl)propiolate (CAS 136634-54-3)
- Methyl 3-(3-hydroxyphenyl)propiolate (CAS 1890847-27-4)
- 2-(2-Hydroxyphenyl)-1H-imidazol-4(5H)-one (CAS 88220-47-7)
- 4-(4-Hydroxyphenyl)-1H-imidazol-2(3H)-one (CAS 944916-40-9)
- 5-(2-Hydroxyphenyl)-2,4-dihydro-3h-pyrazol-3-one (CAS 5186-66-3)
Recommended Standards
- Sofosbuvir Impurity 114 (CAS 701-64-4)
- 2,2-Difluorobenzo[d][1,3]dioxol-5-ol (CAS 1211539-82-0)
- Methyl 2,3,3,3-tetrafluoro-2-methylpropanoate (CAS 38005-11-7)
- Homogentisic Acid-13C6 (CAS 1216468-48-2)
- 6-Amino-5-chloro-pyridin-3-ol hydrochloride (CAS 1263378-32-0)
- 2,4,6-Trichloropyridine-3,5-dicarboxylic acid (CAS 35592-95-1)
- 1,5-Difluoro-2-methyl-3-nitrobenzene (CAS 1188412-98-7)
- 2-(Benzofuran-5-Yl)Ethanol (CAS 1000548-28-6)
- N-(2,2-Dimethyl-3-thietanyl)sulfamide (CAS 1849195-72-7)
- n-((1h-Imidazol-2-yl)methyl)-2-fluoro-4-methylaniline (CAS 1250211-05-2)
- (3S,4R,5S,6S)-4,5-Bis(benzyloxy)-6-((benzyloxy)methyl)-2-(p-tolylthio)tetrahydro-2h-pyran-3-yl4-oxopentanoate (CAS 350600-54-3)
- Methyl 2-cyano-2,3-dihydro-1H-indene-2-carboxylate (CAS 260392-88-9)
- tert-Butyl 3-phenyl-1,2,3,4-tetrahydroquinoxaline-1-carboxylate (CAS 912763-02-1)
- Neuropeptide Y (1-24) amide (human, rat) (CAS 131448-51-6)
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